1 Ospedali Riuniti di Foggia, Department of Respiratory Disease, Foggia; [email protected].
2 IRCCS (Institute for Research and Health Care) Ospedale Casa Sollievo della Sofferenza, Department of Pediatrics, San Giovanni Rotondo.
3 IRCCS Ospedale Casa Sollievo della Sofferenza, Unit of Interventional and Diagnostic Ultrasound of Internal Medicine, San Giovanni Rotondo, Puglia, Italy.